Datasheet

ADS8363
ADS7263
ADS7223
www.ti.com SBAS523B –OCTOBER 2010–REVISED JANUARY 2011
REFDAC1 and REFDAC2 Registers
Two reference DAC registers allow for enabling and setting up the appropriate value for each of the output string
DACs that are connected to the REFIO1 and REFIO2 pins.
Table 8. REFDAC1 Control Register (default = 07FFh)
MSB
BIT 15 BIT 14 BIT 13 BIT 12 BIT 11 BIT 10 BIT 9 BIT 8 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
0 0 0 0 0 RPD D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Bits[15:11] Not used; always set to '0'.
Bit 10 RPD—DAC1 power down.
0 = Internal reference path 1 is enabled and the reference voltage is available at the REFIO1 pin.
1 = The internal reference path is disabled (default).
Bits[9:0] D[9:0]—DAC1 setting bits.
These bits correspond to the settings of the internal reference DACs (compare REFIO section). The D9 bit is the MSB
value of the DAC.
Default value is 1FFh (2.5V nom)
Table 9. REFDAC2 Control Register (default = 07FFh)
MSB LSB
BIT 15 BIT 14 BIT 13 BIT 12 BIT 11 BIT 10 BIT 9 BIT 8 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
0 0 0 0 0 RPD D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Bits[15:11] Not used; always set to '0'.
Bit 10 RPD—DAC2 power down.
0 = Internal reference path 2 is enabled and the reference voltage is available at the REFIO2 pin.
1 = The internal reference path is disabled (default).
Bits[9:0] D[9:0]—DAC2 setting bits.
These bits correspond to the settings of the internal reference DACs (compare REFIO section). The D9 bit is the MSB
value of the DAC.
Default value is 1FFh (2.5V nom)
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